Question: Consider a STM tip scanning a metal surface in constant height mode. (The feedback loop is turned off.) The current is 2 nA at a

Consider a STM tip scanning a metal surface in constant height mode. (The feedback loop is turned off.) The current is 2 nA at a tip/sample distance of 5 . The tip then crosses a step, height of 3. What is the tunneling current after the tip has crossed the step? (Assume a value for j, the so-called inverse tunneling length,--- of 1 -1, and that I~e-2jz

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Chemical Engineering Questions!

In all the examples below, we will inspect electrons interacting with various potentials in one dimension (i.e., along x axis). Think carefully about how each potential looks. Do not engage in...

Suppose an STM tip is scanned (at fixed z height) across a single ad-atom sitting atop a perfectly flat crystalline surface of the same element. Determine the factor by which the current will...

22-24. In these problems, you will describe the potential energy curve for an electron tunneling from a scanning tunneling microscope (STM) tip to the sample's surface that is 3 nm away. Assume that...

nanotechnology only need part C A 1m1m feature needs to be written on PMMA coated Si substrate using scanning probe lithography that employs an STM tip. The total dose required to develop the resist...

materials science- nanotechnology A 1m1m feature needs to be written on PMMA coated Si substrate using scanning probe lithography that employs an STM tip. The total dose required to develop the...

materials science, nanotechnology only need B A 1m1m feature needs to be written on PMMA coated Si substrate using scanning probe lithography that employs an STM tip. The total dose required to...

When a particle such as an electron in an STM tunnels through a barrier, the Heisenberg uncertainty relation can be applied to get an approximate upper limit on the tunneling distance. Suppose an...

Suppose that an STM scans a surface at a distance of a = 1.500 nm. Take the height of the potential energy barrier to be U0 E = 1.70 eV. If the distance between the surface and the STM tip decreases...

The data given in the first table are tip percentages (%) for 60 meals purchased during a typical day at a small restaurant. Each tip was assigned an ID number (#). The restaurant owner wants to...

The price-earnings ratio for the common stock of Benoit Company was 10 at December 31, the end of the current fiscal year. What does the ratio indicate about the selling price of the common stock in...

BE11.12 (LO 5) Indicate whether the following items are capitalized or expensed in the current year. a. Purchase cost of a patent from a competitor. b. Research costs. c. Development costs (after...

Explain why the balance sheet does not portray the market value of the entity. What do the terms "paid-in-capital" and "retained earnings" mean? A summary of the company's significant accounting...

What can be learned about the school from the strategy implementation data?

Are processes and procedures in place that allow teams to consistently look at and respond to student work?

Are layers of support identified for students who struggle?